Implement MediaSession on top of the WebMediaPlayerDelegate.

media/blink/webmediaplayer_cast_android.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Delete this file when WMPI_CAST is no longer needed.
 
 #ifndef MEDIA_BLINK_WEBMEDIAPLAYER_CAST_H_
 #define MEDIA_BLINK_WEBMEDIAPLAYER_CAST_H_
 
 #include "base/memory/weak_ptr.h"
@@ skipping 88 matching lines @@
 
   void OnWaitingForDecryptionKey() override;
 
   bool paused() const override;
   bool hasVideo() const override;
 
   void SetDeviceScaleFactor(float scale_factor);
   scoped_refptr<VideoFrame> GetCastingBanner();
 
  private:
+  base::TimeDelta GetDuration();
+
   WebMediaPlayerImpl* webmediaplayer_;
   blink::WebMediaPlayerClient* client_;
   WebMediaPlayerParams::Context3DCB context_3d_cb_;
   base::WeakPtr<WebMediaPlayerDelegate> delegate_;
 
   // Manages this object and delegates player calls to the browser process.
   // Owned by RenderFrameImpl.
   RendererMediaPlayerManagerInterface* player_manager_ = nullptr;
 
   // Player ID assigned by the |player_manager_|.
   int player_id_;
 
   // Whether the browser is currently connected to a remote media player.
   bool is_remote_ = false;
 
   bool paused_ = true;
   bool initializing_ = false;
   bool should_notify_time_changed_ = false;
 
   // Last reported playout time.
   base::TimeDelta remote_time_;
   base::TimeTicks remote_time_at_;
+  base::TimeDelta duration_;
 
   // Whether the media player has been initialized.
   bool is_player_initialized_ = false;
 
   std::string remote_playback_message_;
 
   float device_scale_factor_ = 1.0;
 
   DISALLOW_COPY_AND_ASSIGN(WebMediaPlayerCast);
 };
 
 // Make a texture-backed video of the given size containing the given message.
 MEDIA_BLINK_EXPORT scoped_refptr<VideoFrame> MakeTextFrameForCast(
     const std::string& remote_playback_message,
     gfx::Size canvas_size,
     gfx::Size natural_size,
     const base::Callback<gpu::gles2::GLES2Interface*()>& context_3d_cb);
 
 }  // namespace media
 
 #endif  // MEDIA_BLINK_WEBMEDIAPLAYER_CAST_H_